2 papers
math-ph2026
The weak coupling limit of the Pauli-Fierz model
Fumio Hiroshima
We investigate the weak coupling limit of the Pauli- Fierz Hamiltonian within a mathematically rigorous framework. Furthermore, we establish the asymptotic behavior of the effectiv…
math-ph2025
Asymptotics for Anisotropic Rabi Models
Masao Hirokawa, Fumio Hiroshima, DongYun Lee
A one-parameter family of self-adjoint operators interpolating between the quantum Rabi Hamiltonian and its rotating-wave approximation is studied. A mathematically rigorous treatm…